Emery grinding-machine.



N. W. KELDER.

EMERY GRINDING MACHINE.

APPLICATION FILED MAY 21, 1912.

1,046,801 Patented Dec. 10, 1912.

2 SHEETSSHEET 1.

attoznu g N. W. KELDER.

EMERY GRINDING MACHINE.

APPLIOATION IIILED MAY 21, 1912.

1,946,801 Patented Dec. 1.0, 1912.

- 2 SHEETS-SHEET 2.

TTTQ? r ea 2% m F?) Q Ma: [Ra CMWWQ Q Qwi Mwooeo NIAL WESLEY KELDER, OF WALDEN, NEW YORK.

EMERY GRINDING-MACHINE.

Specification-of Letters Patent. Patented Dec, 10, 1912.

application filed May 21, 1912. Serial No. 698,705.

To all whom 'it may concern:

Be it known that I, NIAL WESLEY KELDER, a citizen of the United States, residing at Walden, in the county of Orange and State of New York, have invented certain new and useful Improvements in Emery Grinding- Machines; and I do herebydeclare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to grinding and polishing, and it more particularly relates to an improved emery grinding machine.

The primary object of this invention is to provide a series or gang of emery grinding machines for carrying a group of knifeback-springs into operative relation with emery wheels or the like, of the grinding machines.

A further object of the invention is to arrange a group of grinding machines in such relation that they may be thrown into or out of cooperative relation at will.

A still further object of the invention is to provide improved means for adjusting the emery wheels or other grinderwheels, so as to compensate for the 'wear on the grinding surfaces thereof.

A still further object of the invention is to provide for adjusting each grinder wheel independently of the other grinder wheels.

A still further object of the invention is to provide simple and efficient means whereby the grinder wheels may be easily adjusted while in operation.

A still further object of the invention is to provide means whereby the grinder wheelsmay be quickly and easily removed and replaced. 4

A still further object of the invention is to provide a machine of this character, all of the similar parts of which are interchangeable, whereby maximum economy of manufacture is assured.

A still further object of the invention is to provide a machine of this character which is thoroughly efficient and practical in operation.

Other objects and advantages may be recited hereinafter and in the claims.

In the accompanying drawingswhich form a part of this application, Figure 1 is is a fragmental detail view showing the work holder and work in section. Fig. 5 is an end elevation view, illustrating a modified form. Fig. 6 is a fragmental detail view of a modified construction of the man- 'drel and its adjuncts, and, Fig. '7 is a sectional detail view of a modified form of work holder.

Referring to the drawings in which similar reference characters designate corresponding parts throughout the several views, a group of grinder frames 10 are secured upon a base llwhich is seated upon a subbase 12. Each frame 10 constitutes a stationary lower section having upwardly extending arcuate arms 13 and 14, and a movable section 15 pivoted at 16 to the arm 13; said section being arcuate in form, and having a horizontal flange or lug 17 which is apertured and threaded to receive a thumbs'crew 18; the latter also engaging an apertured flange 19, for a purpose hereinafter stated. The arms 13 and Hand the arcuate or semi-circular member 15 constitute a cir cular bearing for the grinder wheel hanger, which consists of a pair of semi-circular disk members 20 and 21, each having their radial edges in contact,-and constituting a disk which fits snugly-within the circular opening through the frame 10. Each of the disk members 20' and 21 is provided with a semicircular aperture having its axis on the radial surface of the disk members, and these semi-circular apertures register so as to form a cylindrical bearing 22 for an end of one of the screw-threaded s indles 23. A pair of oppositely disposed anged nuts 24 are screw-threaded upon each spindle or mandrel 23, and embraces a grinder wheel 25 in the usual manner, and it is obvious that by changing the positions of the nuts 24, the

grinder wheel 25 may be adjusted and secured in adjusted position upon any desired portion of the mandrel.

As more clearly shown in Fig. 6, each mandrel comprises a cylindrical end portion or journal 23', a squared end portion 23 and a threaded intermediate portion 23 The squared portion 23 is preferably of frusto-pyramidal form and fits into a correspondingly shaped socket 26, formed within the'enlarged end portion or head 27, formed on a counter-shaft 28, a shoulder 29 being formed at the junction of the shaft 28 and the head 27. The portion of the shaft 28 adjacent to the head 27 constitutes a journal which is seated in one of the apertures or bearings 22 and carries a toothed pinion 30 on one end, said pinions being adapted to mesh with the teeth of an annular gear 31 or with a spur gear 32, as shown in Figs. 1 and 5.

The gears 31 and 32 may be rotated through any proper medium or by any proper means, but in order that all of the unitary machines may be operated in unison, so as to constitute one complete ganginding-machine, I have rovided aseries of belt pulleys 33, and a series of belt-s 34 engaging the pulleys and uniting them in pairs and in unity, as shown in Fig. 2. The pulleys 33 are mounted on shafts 34, the latter being journaled in bearings 35 and 36, the latter being formed at the axial centers of the grinder wheel hangers. It will be seen, therefore, that these hangers may be rotated within the frame 10, independently of the shafts 34', and without changing the positions of the latter. It will also be seen that, when the grinder wheel hangers are rotated 'in the frame 10, the bearings 22 and mandrels 23 will be raised or lowered, according to the direction in which the grinder wheel hanger is rotated. It is obviously desirable that the journals'23 and 28 shall be in perfect alinement at all times, and therefore, I have provided a substantially U-shaped yoke 3'7 having apertured side members 38, the

members 20 and 21 being provided with corresponding apertures, the apertures of said members 20 and 21 and of the yoke being engaged by screws 39 which retain the yoke in fiX'ed relation to the pair of grinder wheel hangers which it unites, as more clearly shown in Figs. 1, 3 and 5. It is obvious .that, in the position shown in Fig. 1, it is only necessary to move the top parts of the yokes to the left, in order that the grinder wheels 25 may be lowered, and it is also obvious that the yokes 38 may have their tops easily moved rightward or leftward, after the thumb-screws 18 have been loosened, and that by tightening the thumbscrews 18, the yokes and hangers are secured in adjusted position.

I A dove-tailed guide or track 40 is formed or secured on the base 11, said guide being provided with a longitudinal groove 41 in which a screw-threaded shaft 42 is rotatably seated, said shaft 42 having its end portions journaled in bearings 43 and 44.

A combined work holder and carriage 45, consisting of two clamping sections 46 and 47 and a screw-bolt 48, is provided for carrying an article or a group of articles 49, which in the present instance are represented as knife-back-springs; each section of the work holder being provided with a horizontal surface which conforms to the adjacent surfaces of the work carried thereby, and having vertical flanges or shoulders 50 between which the work is clamped. Section 46 of the work holder is provided with a screw-threaded aperture which engages with threads of the bolt 48, while section 47 is provided with an aperture in which the bolt 48 has free movement, said bolt 48 having a head 48 which may be engaged by an ordinary wrench, for tightening the flanges 50 upon the Work, in an obvious manner. The under surface of the member 50 is provided with a concaved screw-threaded portion 51 which engages with the screw or shaft 42 and is adapted to be moved thereby on the dove-tailed guide-40, a dove-tailed groove being formed in the bottom of the work holder, for sliding engagement with the dove-tailed guide 40.

Any proper'means may be provided for rotating the shaft 42, a wheel 52 being shown for this purpose, in Fig. 1, and this wheel may be rotated by hand or by any proper and desired motive power.

A sufficient space is allowed between the bearings 43 and 44-and the respective ends of the guide 40, for stopping the work holder upon the shaft 42 before moving said work holder into engagement with the guide, so that a number of the work holders may be successively placed on the threaded shaft,

and may be thereby caused to travel along the track 40, so that a train of the work holders may be kept moving continually un der the grinder wheels and being operated upon thereby.

In practice, I may employ any number of grinder wheels, each being mounted substantially as described; the mounting of each wheel constituting a unitary grinding machine, and the unitary machines being cooperatively united substantially as shown. I may also provide several sets or series of grinding machines, the rinder wheels of each series being of a di erent character or grade from those of the other series, so that when the work has been operated upon by the primary series, or shaping series, it then passes to the secondary or smoothing series, and thence to thethird series, whereby it is polished or glazed.

Whether one, two or three series of polishing machines are employed, I arrange all 7 of the unitary machines in alinement, so that when the work holder is started under the primary grinder wheels, it continues to move until it has passed under the secondary grinder wheels and under the third series of grinder .Wheels, and emerges therefrom in finished condition.

In order to avoid the necessity for providing two operators, for placing and removing the work holders to and from the machine, I provide the bearing 43 with a cam surface 43', so that when the work holder has emerged from under the last grinder'wheel, and has become disengaged from the dovetailed track 40, it comes into contact with said inclined surface and is thereby disengaged from the threads of the shaft 42,

whereupon the succeeding work holder pushes it away from the machine; and any proper receptacle (notshown) may be provided for receiving the Work holders, as they leave the machine. It will be seen therefore, that only one operator is required, for adjusting, feeding and otherwise attending to the several series of grinding machines.

The work holder shownin Fig. 7 is provided with clamping members 50, between which the knife-back-springs are adapted to be clamped, in a manner similar to that described for the work holder previously specified. In this modified construction, however, the clamping members are provided with slots 50 and 50 the latter being adapted to receive a bar 50, which serves as an end gage, against which the back-springs abut. Rods 50 are seated in certain of the slots 50*, and serve as supports on whichthe back-springs rest. It will be seen that the rods 50? may be placed in the notches 50, according to the size and shape of the back; springs supported thereby. This form of work holder is employed when the back surface of the back-springs are to be operated upon, whereas the reviously described work holder is employed when the opposite surfaces are to be operated upon.

It will be seen that the disk members 20 and 21 are provided with flanges 15, which prevent lateral movement thereof in the frames 10, while the shoulders 29 abut against the vertical surfaces of certain of the hangers, for preventing lateral movement of the shaft 28 and the mandrel 23, in the direction of the belts and pulleys. I provide certain of the bearings 22 with thrust blocks 22, resiliently mounted in any proper way, for instance, upon a flat spring 22 secured to the outer surface of the hanger. By this means, I may remove either of the mandrels and grinder wheels, by simpl removing one of the screws 39 and the t umb-screw 18 from each of the opposite frames 10, and then swinging the elements 15 upon the hinges l6 sufliciently to relieve the journal 23' from the bearing 22, whereupon the squared end portion 23" may be removed from the socket 26, and the grinder wheel may then be removed from whichever end of the threaded portion to which it may benearest, and thus accomplishing a considerable saving of time, while avoiding necessity for removing the gear wheel 30 with the mandrel 23.

In the form 'shown in Fig. 5, the gear wheel 32 is mounted upon a shaft 32, the latter being rot-atably mounted in bearings 35 and carrying pulleys 33, the latter carrying a belt 34 and adapted to be driven through the medium of a belt 34. In this construction, the gear wheel 30 meshes with the gear wheel 32 instead of'with the annular gear described in connection with Fig. 1, and it will be seen that in both of these forms, the gear wheels are in mesh in every position of adjustment of the hangers,

While I have shown and described these embodiments of my invention, I do not wish to'limit my invention to these exact details of construction, butmy invention may only be limited by a reasonable interpretation of the following claims.

1 What I claim is:

1. In a grinding machine, a pair of oppositely disposed frames having a circular opening therethrough, a pair of circular hanger members seated within the openings and ada ted to be rotated therein, each said hanger ing provided with a concentric bearing and an eccentric bearing, the concentric bearing having a driver shaft jourthe naled therein, the eccentric bearing havlng a shaft journaled therein, a grinder wheel operat-ively connected with the last said shaft, 7

the last said shaft being operatively connected'with the first said shaft, and means. connecting the circular hanger members and adapted to be manipulated for adjustin the position of the grinder wheel and o the second said shaft independently of the first said shaft. 4 2. In a ang grindin machine, a series of grinder w eels, a trac under the grinder wheels, a work holder slidably seated on the track, means for moving the work holder along the track into and out of operative contact with the grinder wheels, and means for dislodging the worke holder from the grinding machine after the tion has been completed;

3. In a grinding machine, a base, a grinder wheel, a guide on said base, and a work holder slidably engaged with the guide for carrying an article into operative contact with the grinder wheel and beyond the latter, said guide and work holder being provided with retaining means for preventlng disengagement of the work holder from grinding opera- 7 the guide when the work is in contact with the. grinder ,wheehsaid retaining ineans tername to this specification the presence of minating beyond the position of operative two subscribing witnesses. contact so that the work holder .may be removed from the guide after the work holder NIAL WESLEY L 5 has passed beyond said position of operative Witnesses:

contact. v ADAM UNVERZAGT,

In testimony whereof- I have signed my FRED CRAWFORD. 

